Method for providing variable bit rate in streaming service

Abstract

In the method for managing a variable bit rate so as to provide a streaming service and in the record medium capable of being read through a computer having a record of a program to realize the inventive method, a frame rate controlling system through a removal of a frame and a fidelity controlling system are used to change a bit rate of multimedia video data and thereby provide a multimedia streaming service based on the various bit rates according to a bandwidth change of a communication network, the fidelity controlling system being gotten by differently providing selection ranges for discrete cosine transform (DCT) coefficients in a unit of a block within a frame. This inventive method comprises a first step of decomposing an original video bit stream stored already, into a file type capable of supporting the variable bit rate, and then storing it; a second step of merging data based on the decomposed type by considering a traffic state of a communication network; and a third step of providing the streaming service by using the video bit stream merged, whereby effectuating in a use of an information communication system etc.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a method for providing a variable bit rate in a multimedia streaming service and a record medium capable of being read through a computer having a record of a program to realize the inventive method, in a media scaling technique field of a transducing technique for varying a bit rate of original data so as to control a quantity of transmission data by adapting to a change of a communication network bandwidth in the multimedia streaming service.DESCRIPTION OF THE PRIOR ART[0002]Conventional techniques in this field are almost based on a transcoding system to control a bit rate of multimedia data.[0003]That is, it is selected a method for simply controlling only a frame rate of a method for re-controlling a quantization parameter Q used in a video compression in order to gain a desired bit rate through a control of a fidelity.[0004]In the simple frame rate controlling method, there is a considerable effect of reducing a bit ...

AI Technical Summary

Benefits of technology

[0014]That is, the steaming is the technique for receiving a sound and moving picture by the real time in an internet, and represents an internet solution for embodying multimedia contents such as audio and video etc. in an internet web, and also allows the multimedia data to be transmitted to a personal computer(PC) through the internet and allows a time required for transmitting massive moving picture data to the internet to be minimized. Such streaming service is influenced by a network bandwidth as the most serious shortcoming, and requires more powerful personal computer so has a restricted service.

[0017]That is to say, a control of the bit rate in various range is valid according that in the MPEG-1 and MPEG-2 video data, employed can be simultaneously the frame rate controlling method through the frame removal and the fidelity control ling method in which the selection ranges of the discrete cosine transform(hereinafter, referred to as “DCT” coefficients are differently provided by the block unit within the frame. Particularly, in the fidelity controlling method, only a DCT coefficient within a range proper to a desired bit rate is employed from the bit stream based on the already compressed type, instead of employing a re-quantization system by the quantization parameter Q. Therefore, a performance for a process time can be heightened by reducing the process time necessary for a restoring and a re-compression of the video bit stream.

Problems solved by technology

In the simple frame rate controlling method, there is a considerable effect of reducing a bit rate of a bit stream transmitted by reducing the number of firstly reproduced frames under a state that an original fidelity is maintained, but a limitation in providing a bit rate of various bandwidth.

In the method for controlling the fidelity by re-controlling the quantization parameter Q, there is an effect of reducing the bit rate of the bit stream transmitted by a degradation of a fidelity, but the quantization parameter Q re-controlled after restoring already compressed video data to the original state should be applied, to again perform the quantization, therefore, a process based on a real time is difficult and this method is not suitable for the real time multimedia streaming service.

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